diff --git a/du3/program.c b/du3/program.c
index 86a5d23..2952984 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -98,7 +98,7 @@ int main()
 
                     if (strBuffer[i] == '+' || strBuffer[i] == '-' || strBuffer[i] == '/' || strBuffer[i] == '*')
                     {
-                        op1 = i;
+                        op1 = strBuffer[i];
                     }
                     else if (strBuffer[i] == '.')
                     {